 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.resources;

 import org.eclipse.core.internal.utils.Messages;
 import org.eclipse.core.internal.utils.Policy;
 import org.eclipse.core.resources.ISaveContext;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.*;
 import org.eclipse.core.runtime.jobs.Job;

 /**
  * Performs periodic saving (snapshot) of the workspace.
  */
 public class DelayedSnapshotJob extends Job {

     private static final String MSG_SNAPSHOT = Messages.resources_snapshot;
     private SaveManager saveManager;

     public DelayedSnapshotJob(SaveManager manager) {
         super(MSG_SNAPSHOT);
         this.saveManager = manager;
         setRule(ResourcesPlugin.getWorkspace().getRoot());
         setSystem(true);
     }

     /*
      * @see Job#run()
      */
     public IStatus run(IProgressMonitor monitor) {
         if (monitor.isCanceled())
             return Status.CANCEL_STATUS;
         if (ResourcesPlugin.getWorkspace() == null)
             return Status.OK_STATUS;
         try {
             return saveManager.save(ISaveContext.SNAPSHOT, null, Policy.monitorFor(null));
         } catch (CoreException e) {
             return e.getStatus();
         } finally {
             saveManager.operationCount = 0;
             saveManager.snapshotRequested = false;
         }
     }
 }

